Grain-oriented electrical steel sheet for iron core and method of manufacturing the same
US10026533B2 · kind B2 · utility
1Cited by
1References
16Claims
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Key dates
| Filing date | Aug 29, 2013 |
| Grant date | Jul 17, 2018 |
| Priority date | — |
| Expiry date | Mar 28, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/60
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
According to the present invention, a grain-oriented electrical steel sheet for iron cores exhibiting excellent transformer iron loss properties in an excitation range from 1.5 T to 1.9 T is provided, in which a residual stress of 150 MPa or more is formed near strain regions, each extending 300 μm or less in the rolling direction and 42 μm or more in the sheet thickness direction, and the strain regions are formed periodically at intervals of 2 mm to 10 mm in the rolling direction, with reduced energy loss in transformers in operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.